of brooklyn



Reued June 10, 1924.

ALWIN VON AUW, OF BROOKLYN, NEW YORK, ASSIGNOR TO BODRUM & PEASE COM-PANY, 0F BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

PLUG HINGE FOR LOOSE-LEAF BINDIELRS` Original N0. 1,474,866, datedNovember 20, 1923, Serial No. 596,766, led October 25, 1922.

reissue led April 9, 1924.. Serial No. 705,285.

`To all whom t may concern:

'a citizen of the United States of America,

and resident of the borough of Brooklyn, in the county of Kings andState of New York, have invented a certain new and useful Plug Hinge forLoose-Leaf Binders, of which the following is a specification.

My invention relates to loose leaf binders and more particularly tobinders having hollow clamping bars.

, One object of my invention is to provide a binder having only a few,simple parts, and one which consequently will be easy to manufacture.Another object is to reduce the number of machines, tools and partsnecessary to manufacture a line of binders, by providing stock partswhich can be used for diffe-rent sizes and styles of binders. vAnother`object of my invention is to provide a binder having a strong coverhinge.

In the drawings:

Fig. 1 is a partial plan view of the 'top cover and clamping member of aloose leaf post binder embodying my invention;

Fig. 2 is a perspective view of one end of the clamping` bar with myunitary cap hinge ready for insertion;

Fig. 3 is an inverted perspective view of the same parts from anotherangle;

Fig. 4 is a perspective view of one form of plug-hinge for the end ofthe tube opposite to that' shown in Figs. 2 and 3;

Fig. 5 is a section on line 5-5 of Fig. 1;

Fig. 6 is a section on line 6-6 of Fig. 1.

In many types of loose leaf binders there are clamping bars to hold thesheets in the binder together, and the covers are hinged to them.

These clamping bars are generally hollow tubes and have hinge knucklesformed on them as integral parts. These members are usually stamped outfrom a die and then bent into shape, a separate die being re.y

quired for each arrangement and style of tube and hinge. The alternateknuckles are formed on the cover and the tube, and the parts fastenedtogether by a pin inserted through the alternated knuckles. The ends ofthe tube are closed by plug caps.

My invention eliminates the necessity for the elaborate dies which havebeen required for dierent sizes and styles of binder by Application Afor having one single member act both as end hin e and as plug cap ashereinafter descri ed.

In my device the vend plug of the ytube and the hinge knuckle of thetube are combined in a unitary plug hinge member 1. The plug portion 2of this member 1 is adapted to fit into the end of a clamping bar ortubeA 3 and can be held in position by any suitable fastening means,such for example, as pins 4,' passing through the tube and plug from'one side to theother. The outer end ofthe plug'hinge member 1 has aiiange zbearing against the end of the tube.

Along one side'of the plug portion 2 is a hinge knuckle or sleeveportion 6 bored to receive a hinge pin 7. A web 8 joins the` hingeportion directly' to the part -of the plug` portion adapted'to fitinside the tube. The tube 3 is'cut away on one side, as by slot 9sufliciently to permit the web 8 to project through the tube when theplug is in position. This web 8 preferably reaches to the full depth ofthe plug portion though it can be partly cut away if desired. I preferto make the plug, hinge and web portion of the member 1 out of one solidpiece, though by the phrase onepiece I mean to include both integralstructures and those built up into a unitary structure from severalpieces. I prefer to offset the web portion slightly toward the surfaceof the tube 3 which is next the sheets, in order to permit the cover tolie snugly against the sheets. This offsetting is seen most clearly in Fig'. 5.

One of these plug-hinge members is fastened in each'end of the tube 3,and on the cover is a hinge knuckle or sleeve 10 reaching .between thesleeve portions 6 of the two plug-hinges in the end of the tube. The pin7 is passed through the three sleeves to fasten the tube and covertogether.

The depth of the part of the plug portion fitting in the tube may beless than the length of the hinge portion-as shown in the drawings, sothat the hinge portion extends along the tube further than the plugportion, or. if desired, the plug portion may extend further than thehinge portion. It should also be understood that the plug hinge may beof any desired shape such for instance as that shown in the ap-`'inserted in the end of the tube an portion directly united to the endplug por- :together as a unitary device, is not only easy to4rmtnufacture, and stron but the appearalnce and strength of a inderembodyin it'issuperior to those now on the market.

y Vhat I claim is 1. In a Iloose leaf binder, a hollovs7 member, aonepiece end plug and hinge member fitting in said hollow member andprojecting Ythrough one side thereof.

2. VIn a loose leaf binder having a clamp 'ing member in the form of atube, a oneportion piece member having an end plug a hinge tion throughan opening in the wall of the rtube.

3. In a loose'leaf binder having a clamping member in the form of atube,a onepiece member having an end plug portion inserted in the end of thetube and a hinge portion directly united to the end plug portion throughan opening in the wall of the tube, said union of the end plug and hingeportions extending the full depth of the insertion part of said end plugportion.

4. In a loose leaf binder, a clamping bar having a slot at its end, incombination with a one-piece member comprising 'a plug portion, a hingeportion and a webportion uniting said other portions and projectingthrough the slot in said clamping bar.

5. In a loose leaf binder, a clamping bar having a slot at its end, incombination with a one-piece vmember comprising a plug portion, a hingeportion and a Web por-tion uniting said other portions and projectingthrough the slot in said clamping bar, said one-piece member being boredto permit access to the interior of said clamV ing bar.

6. In a loose leaf binder, a ho low clamping bar havinga slot in the endthereof, in combination with a 'combined plug and hinge member fittingin the end of the bar and having a part `which projects through saidslot.'

ALWIN voN AUW.

